Modern information and communication technologies

Excel (part 1):
     Tasks: 1, 2, 3a, 3b, 3c, 3d, 4a, 4b, 4c, 4d, 4e.

Excel (part 2):
     Tasks: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12.